Search results
Results From The WOW.Com Content Network
This photo shows tactile markings identifying stairs for visually impaired people. The somatosensory system, or somatic sensory system is a subset of the sensory nervous system. It has two subdivisions, one for the detection of mechanosensory information related to touch, and the other for the nociception detection of pain and temperature. [1]
Evaluation of somatosensory stimuli are limited by the patient's interpretation of sensation in response to testing. Tactile sensation is tested with a cotton wisp or light touch with a finger. Pain is assessed by pinprick or pinwheel (Wartenberg wheel). A 128 Hz tuning fork is used for testing vibrations. [citation needed]
Tactile discrimination is the ability to differentiate information through the sense of touch. The somatosensory system is the nervous system pathway that is responsible for this essential survival ability used in adaptation. [1] There are various types of tactile discrimination.
The intensity of pain reported is consistently reduced in response to touch. [5] [6] [7] This occurs whether the touch is at the same time as the pain, or even if the touch occurs before the pain. [8] Touch also reduces the activation of cortical areas that respond to painful stimuli. [9]
When people with fibromyalgia are subjected to intense stimuli, they experience sensory overload in the form of pain. It is theorized that abnormal activity of the left dorsolateral prefrontal cortex and reduced production of or reception to serotonin are partially responsible for the sensation of pain in response to intense stimuli. [29]
Hyperalgesia and allodynia are examples of neuropathic pain. It is thought that the activation of specialized neuronal nociceptors are responsible for hyperalgesia. Studies suggest that hyperalgesia and allodynia are set off and sustained by certain groups of mechanosensitive sensory neurons.
Cutaneous receptors are at the ends of afferent neurons. works within the capsule. Ion channels are situated near these networks. In sensory transduction, the afferent nerves transmit through a series of synapses in the central nervous system, first in the spinal cord, the ventrobasal portion of the thalamus, and then on to the somatosensory cortex.
' pain receptor ') is a sensory neuron that responds to damaging or potentially damaging stimuli by sending "possible threat" signals [1] [2] [3] to the spinal cord and the brain. The brain creates the sensation of pain to direct attention to the body part, so the threat can be mitigated; this process is called nociception.